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Community Water System · PWS AZ0414014

Shepard Water Company

Yuma, Arizona 85365 - drinking water served from groundwater sources to 430 people, tracked in EPA SDWIS and UCMR5.

430
People served
344
EPA violations
76
Health-based
Untested
UCMR5 result

The verdict

EPA records 344 drinking-water violations at Shepard Water Company, 22% of them health-based - above the Arizona per-system average.

344
Total EPA violations on record
22%
Health-based (MCL / treatment failure)
430
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Shepard Water Company

Shepard Water Company is a private-owned community water system that delivers drinking water to 430 residents in Yuma, Arizona (Yuma County) through 163 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 344 total violations for this system , of which 76 (22%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 195 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Arsenic, recorded in 61 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Arizona, EPA tracks 1,493 public water systems serving 7,322,166 people, with 228,944 cumulative violations and 15,663 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 153.3 violations. Statewide, 145 of 152 UCMR5-tested systems have reported PFAS detections (95.4%).

Shepard Water Company's 344 violations sit above the Arizona average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
430
Total Violations
344
Health-Based Violations
76
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
163
County
Yuma
School/Daycare
No
MCL Violations
64
Monitoring Violations
195
Treatment Tech Violations
12

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 61 2022
Chlorine MR 45 2025
Consumer Confidence Rule Other 22 2020
Lead and Copper Rule MR 20 2025
Arsenic MR 19 2019
Total Haloacetic Acids (HAA5) MR 19 2025
TTHM MR 18 2025
Revised Total Coliform Rule MON 14 2025
Public Notice Other 14 2022
Revised Total Coliform Rule RPT 12 2025
Groundwater Rule TT 8 2021
Nitrate MR 6 2009
Fluoride MR 4 2000
Lead and Copper Rule TT 4 2022
Fluoride MCL 2 2000
Coliform (TCR) MR 2 2008
Gross Alpha, Excl. Radon and U MR 2 1989
Simazine MR 1 1997
Di(2-ethylhexyl) phthalate MR 1 1997
Hexachlorocyclopentadiene MR 1 1997
Carbofuran MR 1 1997
Heptachlor MR 1 1997
2,4-D MR 1 1997
HEXACHLOROBENZENE MR 1 1997
Benzo(a)pyrene MR 1 1997
1,2-DIBROMO-3-CHLOROPROPANE MR 1 1997
1,2,4-Trichlorobenzene MR 1 2001
Methoxychlor MR 1 1997
Toxaphene MR 1 1997
Dalapon MR 1 1997

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Shepard Water Company.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID AZ0414014 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Arizona Drinking Water Authority

Arizona DEQ, Drinking Water Program is the primacy agency that licenses and inspects Shepard Water Company under EPA-delegated authority.

Open AZ regulator portal

Source: Arizona DEQ, Drinking Water Program

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 Chlorine MR 45 SDWIS / AZ0414014 / 0999
2025 Lead and Copper Rule MR 20 SDWIS / AZ0414014 / 5000
2025 Total Haloacetic Acids (HAA5) MR 19 SDWIS / AZ0414014 / 2456
2025 TTHM MR 18 SDWIS / AZ0414014 / 2950
2025 Revised Total Coliform Rule MON 14 SDWIS / AZ0414014 / 8000
2025 Revised Total Coliform Rule RPT 12 SDWIS / AZ0414014 / 8000
2022 Arsenic MCL 61 SDWIS / AZ0414014 / 1005
2022 Public Notice Other 14 SDWIS / AZ0414014 / 7500
2022 Lead and Copper Rule TT 4 SDWIS / AZ0414014 / 5000
2021 Groundwater Rule TT 8 SDWIS / AZ0414014 / 0700
2020 Consumer Confidence Rule Other 22 SDWIS / AZ0414014 / 7000
2019 Arsenic MR 19 SDWIS / AZ0414014 / 1005
2009 Nitrate MR 6 SDWIS / AZ0414014 / 1040
2008 Coliform (TCR) MR 2 SDWIS / AZ0414014 / 3100
2008 Coliform (TCR) MCL 1 SDWIS / AZ0414014 / 3100

How Shepard Water Company Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Shepard Water Company Arizona avg Federal benchmark
Total violations 344 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 76 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 95.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 430 4,904 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,493 regulated public water systems in Arizona.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Shepard Water Company water safe to drink? ▼
Shepard Water Company (PWS ID: AZ0414014) has 344 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 430 people using Groundwater sources.
How many people does Shepard Water Company serve? ▼
Shepard Water Company serves 430 people in Yuma, Arizona. It is a Private-owned system using Groundwater water sources with 163 service connections.
What type of violations does Shepard Water Company have? ▼
Shepard Water Company has 344 total violations: 76 health-based violations (MCL exceedances or treatment failures), 195 monitoring/reporting violations, and 12 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Shepard Water Company water? ▼
No PFAS testing data is available for Shepard Water Company under the EPA's UCMR5 monitoring program.
What water source does Shepard Water Company use? ▼
Shepard Water Company uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.